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Best Buy offers My Best Buy members the TP-Link 10-watt (60-watt Equivalent) A19 E26 Multicolor Dimmable WiFi LED Smart Bulb for $19.99 with free shipping. (You must be signed in to your account to see this price. Not a member? It's free to join.) That's $3 under last month's mention and the lowest price we've seen. (It's the best deal now by $5.) It has built-in WiFi, allowing you to remotely control the bulb's settings via the Kasa app. Other features include 16 million color choices and compatibility with Amazon Alexa or Google Assistant.